Rotabt pump and bloweb



l..- H. ROGERS,

ROIMW PUMP MID BLDWEEL.

APPLICATION min an gum.

1,317,989. Patented 001;. 7,1919.

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ROTARY PUMP MID BLOWER.

7 APPLICATION men In 4. ma. 1,317,989. Patented 0% 7,1919.

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L. 3. ROGERS.

BOIABY PUMP Mu} MOWER.

APrucAnoa men MAY 4. "l3.

Patented Oct. 7, 1919.

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LEE I-I. ROGERS, OF KANSAS CITY, MISSOURI.

ROTARY PUMP AND BLOWER.

Specification of Letters Patent.

Patented Oct. '7, 1919.

Application filed May 4, 1918. Serial No. 232,444.

liquids and seeks to provide a slmple, efli-- cient and durable pump,which is of extremely inexpensive construction.

Considerable trouble is experienced in the operation of rotary pumps,caused by the wings or air moving blades being positioned during thecompression movement thereof,

with the out ends of the blades scraping endwise, or nearly soagainstthe cylindrical casing, resulting in wearing grooves and rou hness inthe casing and the ends of the blades owing to the narrow bearing of theblades on the casing. In rotary pumps heretofore wherein the blades'werehingedly connected to the body of the piston, the hinges have not beenof a construction that was endurable, and where they have become looseand inoperative it has been found that they could not be repaired andthe only remedy was by replacing both body and blades.

It is essential that a rotary pump be provided with blades having agreater width of bearing against the casing, and that the hingeconnections of the blades to the body of the piston be more durable andcapable:

of being repaired without renewal.

The present invention seeks to provide an improved rotary pump or blowerfor creat-' ing vacuum and pressurein air and gases and for pumpingwater and other liquids, with blades provided with endurable andrepairable hinged connections to the piston body, and with the bladeshaving sufiicient bearing against the cylindrical casing to preventscraping and cutting of grooves, so that the iston will not lea With tese and other objects in view the invention consists in the features ofconstruction, cdmbinations and arrangement of parts hereinafter setforth and more articularly pointed out in the appended claims, theaccompanying drawings illustrating a structure embodying theimprovements.

In the drawings Figure 1 is a view in side elevation with reference tothe length of the shaft, of the improved pump.

Fig. 2 is a view in end elevation with reference tothe length of theshaft, of the pump.

Fig. 3 is a sectional view of the cylindrical casing taken on line 1-1of Fig. 1, and of the piston on line 22 of Fig. 4.

Fig. 4 is a sectional view taken on line 3-3 of Fig. 3.

Fig. 5 is a side view of one of the piston blades.

Fig. 6 is an end view of one of the piston blades.

Fig. 7 is a view of one of the packing blades and shaft shapedconnections as viewed when looking toward the axis of the piston.

Fig. 8 is an end view of one of the packing blades and the connectinshaft.

Fig. 9 is a sectional view of the body of the piston taken on line 4--4of Fig. 3.

The cylindrical casing is provided with the outer walls 2 and 3 formingthe intake and discharge ports 4 and 5 respectively, the wallsterminating in the bosses 6 and 7 respectively, which are as shownprovided with the screw threads 8 and 9 respectively for pipeconnections.

The casing 1 is provided with the integral web shaped projections 10which form a su porting base, it being understood that t e pump may beinstalled for operation in any position, the base projections sometimessupporting the pump from above instead of from below as shown.

The casing'heads 11 of duplicate construction are preferably as shownintegral with the boss shaped journal boxes 12 and are secured to thecasing by the stud bolts 13 and nuts 14.

The shaft 15 is journaled in the boxes 12 and has rigidly mountedthereon the body 16 The wings or blades 23 of the piston are providedwith the bosses 24, which are mounted on the shafts 22, spanning thebosses 21, and provided with the inte ral web 26, the latter beingparallel to the s aft and curved partially around the boss 21, so noleakage of air gas or liquid can occur between the blades and the boss21.

The blades 23 are of a length that will allow the ends 27 thereof tobear against the heads 11 but not so tight as to interfere with theblades being rotated by the body 16, so that the piston will rotateeasily but not allow any perceptible leakage between any part thereofand the heads 11.

The shaft shaped hinge connections 28 are fitted in the holes 18, andhave the packing blades 29 inserted therein as shown and rigidlytherewith, the hinge connections forming a seal against air gas andliquid passing therearound in the holes 18, and theblades bearingagainst, the webs 26 of the blades to prevent leakage between the websand the hinge connections, the latter and the blades reaching from onehead 11 to the other head 11 so that no leakage can occur around theends of the hinge connections and blades.

The shaft 15 is eccentrically located in the cylindrical casing and theedges or outer ends 30 of the piston blades 23 bear against thecylindrical casing so that as the blades pass the intake port a theouter ends 80 thereof are extended to a greater distance from the axisof the shaft 15 than when the ends 30 pass over the discharge port- 5.From the foregoing it will be understood that the space between eachadjacent pair of blades is greater when near the intake port than whennear the discharge port 5 so that air gas or liquid will enter betweenthe blades from the intake port and be discharged thsough the dischargeport as the piston v The pimo'n body 16 rotates in the direction of thearrow 21 and it will be worthy referring to Fi 3 of the drawings thatthe ends 3001? the fiad es 23 are considerably in advanee of the hingeshafts 22 in the direction of rotation so that the end 30 of the bladeswill slide freely within and against the cylindrical casing and theywill not scrape endwise against the casing and cut and wear moves in thecasing and in the blades.

The hinge connection of the blades 23 to the body 16, comprising thebosses 21, shafts 22 and bosses 2* form a hinge or pivotal connectionthat is strong and durable, and that an be renewed when worn by reamingthe interior of the bosses with an ordinary reamer of well knownconstruction found h m a m: was an be owned a: an mu in most repairshops, and larger shafts may be inserted in the bosses, and the hingedconnection is renewed with no new parts except the shafts which areinexpensive.

The hinge connections 28 do not rotate or move in any direction duringthe revolution of the piston, unless the pressure between the ad acentpair of blades 23 should 1ncrease above the discharge pressure afterpassing the discharge ort 5, in which latter event the packing blades 29are free to lift from the webs 26 integral with the blades 23 and allowthe excess pressure to esca e to between the next adjacent pair of blaas 23 in advance of and in the direction of rotation from the pairbetween which the excess pressure occurs.

It will be understood from the foregoing description that the improvedrotary pump is of a construction that permits the employment of strongheavy parts, and that it will operate smoothly against high pressure ata high speed and Withstand excessive duty owing to the hinge connectionof the blades 23 and the extreme advance in the direction of rotation ofthe ends 30 of the blades 23.

What I claim as new, and desire to secure by Letters Patent is:-

1. In a rotary pump, a cylindrical shaped housing, heads closing theends of said housmg, a main shaft journaled in said heads, said shafteccentric to the interior -of said housing, a rotary piston body rigidlymounted on said shaft within said housing and abutting said heads, armsprojecting radially from said body, said arms each terminating in a bosswith the axis thereof approximately parallel to said main shaft, a bladehinge shaft in each of said bosses, a piston blade provided with bossesand hingedly connected to said hinge shaft the outer end of said pistonblade bearing against the interior of said cylindrical housing at aposition considerably in circular advance of the companion shaft, hingepacking shafts in said body, and a packi'n blade in each .of said hingep-acki sha ts and making connection with the a 1acent piston blade.

2. In a rotary pump, a cylindrical housing, heads closing said housing,a main shaft journaled eecentrically in said heads, a pieton body onsaid shaft, arms, projecting radially from said body, shafts passingthrou said arms, a piston blade hing'edly connecting to each of saidshafts, and a flat packing blade conneetin from each of said pistonblades to said nan n noonns.

a, a sum as a a. B, 62"

